Reservoir-lamp



(No Model.) o. SWEBNBY.

RESERVOIR LAMP. v No. 277,888. Patented May 15,1888.

JNVENTOR: MMM/ W1 TNESSES UNITED j STATES PATENT OFFICE.

OLIVER SWEENEY, OF PHILADELPHIA, PENNSYLVANIA.

RESERVOIR-LAMP.

SPECIFICATION forming part of Letters Patent No, 277,808, dated May 215, 1883.

Application led November 17, 1882'. (No model.)

To all whom t may concern Be it known that I, OLIVER SWEENEY, a

citizen of the United States, and a resident of Philadelphia, Pennsylvania, 4have invented certain Improvements in Reservoir-Lam ps, of which the following is a specification.

My invention relates to certain improvements in that class of lamps in which the Iiow of oil to the burners is regulated by the intermittent admission of air to the closed 0il=res ervoir, the objects of my invention being to simplify the construction of such lamps and to lessen the cost of the same without sacrifice of efficiency.

In the ,accompanying drawings, Figure l is a verticalsection of a lamp with my improvements, th burners and wick-tubes being in outside view Fig. 2, a vertical section of part of the same on a smaller scale, and with some of the parts in a different position and Fig. 3, a View showing a modification of part of the invention.

A is the casing' of the lamp; which incioses the oil-chamber B, the discharge-opening b of which is surrounded by an upwardly-project-` ing flange, d. The chamber B communicates through tubes e with any desired number ot' hurnertubes having the usual burners and wicks, and said chamber is closed at the top by a cap, E, to a central threaded opening in which is adapted a threaded tubular plug,`F. Through this plug passes a tubular stem, G, carrying two valves, j' and g, the former opening downward and being adapted to the seat formed by the lower end of the plug F, and the valve g opening upward and being adapted to a seat 'formed by the upper edge of the flange d, surrounding the discharge-openin g b. The valves f and g are so arranged that when the upper valve is closed the lower valve, g, will be open, and vice versa. The stem G is open at both ends, as shown in Fig. 1, and is acted upon by a spring, m, and a yoke, n, the spring being interposed between the valve f and an annular rib, t, on the flange d, and the yoke being pivoted to a flan ge on the plug F, and adapted to act upon a cap, p, on the stem G, so as to holdthe said tube in position after it has been depressed.

The operation is as follows: The stem G is first depressed, so as to open the valve fand close the valve g, as shown in Fig. 2, and the oil is then introduced into the chamber B, in which it rises to the proper height. The stem lG is then released from the control of the yoke 'n and allowed to rise, so as to close the valve f and open the valve g. Oil will Iiow from the chamber B through the outlet b and the distributing-pipes to the wick-tubes as long as the lower end of the stem G is unobstructed, air passing down through the stem and up through the oil in the chamber B to the space above the same. The flow of oil in this mam ner continues untilthe level of oil in theJ wickn tubes and in the chamber within the flange d reaches such a height as to prevent the further ingress of air through the stem G. The Ilow then ceases, there being no access of air to the space above the oil in the chamber B. There is a slight rise of oil in the stem G, and as the oil is consumed in the wick-tubes the oil falls in said stem G until air can again pass through the same, when there is a further iiow of oil into the stem, and these operations are repeated until all of the oil is consumed, the level of the oil in the wick-tubes liever rising above the level ot' the lower end of the stem G. Simplicity of construction is the result of placing on ,the stem G the two valves, one

opening downward and the other upward, andl utilizing said stem G as the air-supplying tube. The latter feature, however, is not essential to the invention, as the air-supplying tube may, it' desired, be independent of the stein G, as shown in Fig. 3.

A stop-valve, fw, is placed between the oilreservoir and the distributing-pipes c, in order to cut oli' the liow of oil to the wick-tubes and burners in the event of leakage of air into the chamber B, or when it becomes necessary from other causes.

I claim as my inventionl. The combination of the casing A of the oil-chamber, havin g the internal valveseats, d

and F, with the stem G, having the two valves 1 a means of supplying air to the oil-chamber at 1o f and g, closing in opposite directions and a fixed point, as set forth.

adapted to the seats d and F, and With means In testimony Whereofl have signed my name for supplying air to the chamber at a fixed to this specification in the presence of tWo sub- 5 point, as set forth. scriloing Witnesses. y

2. The combination of the casing A of the OLIVER SWEENEY.

oilchamber, having the opposite internal valve-seats, d and F, with the tubular stem G, having the two valves f and g, and serving as Witnesses:

HARRY DRURY, 1 HARRY SMITH. 

